Haemorrhagic disease of the newborn
(重定向自Hemorrhagic disease of newborn)

Haemorrhagic disease of the newborn, also known as Vitamin K Deficiency Bleeding (VKDB), is a coagulation disturbance in newborns due to vitamin K deficiency. As a consequence of vitamin K deficiency there is an impaired production of coagulation factors II, VII, IX, X, protein C and protein S by the liver.